Hi Silvano,
try this:
Press Rhythmbutton and touch the CHORD INPUT TYPE. .On the next Screen Change the Input Type to FULL RANGE by touching it..
So you can Change the Cords on the full Keyboard.
This allows you to Play a single note with the left Hand and the Rest off your Cord with the right Hand.
It is possible to Play the Cord with the Left or the right Hand.
You can use other Instruments for Upper and Lower Keyboard as well as the ACCOMP.
Maybe thats what you want.
Karl-Heinz